A Student in form four placed a thermometer in molten naphthalene at 850C and recorded the temperature and time until the naphthalene solidified. From the...

      

A Student in form four placed a thermometer in molten naphthalene at 850C and recorded the temperature and time until the naphthalene solidified. From the values obtained, the figure below was drawn.
fig102832019255.png

(a) What name is given to such a figure?
(b) Which part of the figure represents the change of state of naphthalene?
(c)In terms of kinetic theory. Explain what happens to molecules along AB.

  

Answers


Kavungya
a) Cooling curve
b) BC
c) The kinetic energy of the molecules decrease as heat energy is lost to the surrounding leading
to a drop / decrease in temperature.
Kavungya answered the question on March 28, 2019 at 11:57


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